NEBULA

Nebula

A nebula (from Latin: "cloud") is an interstellar cloud of dust, hydrogen, helium and other ionized gases. Originally,nebula was a name for any diffuse astronomical object, including galaxies beyond the Milky Way. The Andromeda Galaxy, for instance, was referred to as the Andromeda Nebula (and spiral galaxies in general as "spiral nebulae") before the true nature of galaxies was confirmed in the early 20th century by Vesto Slipher, Edwin Hubble and others. Nebulae are often star-forming regions, such as in the Eagle Nebula. This nebula is depicted in one of NASA's most famous images, the "Pillars of Creation". In these regions the formations of gas, dust, and other materials "clump" together to form larger masses, which attract further matter, and eventually will become massive enough to form stars. The remaining materials are then believed to form planets, and other planetary system objects.

Here are some few photos

The Cat's Eye Nebula

Carina Nebula
(

ESO - http://www.eso.org/public/images/eso0905a/

Colour-composite image of the Keyhole, a dark nebula within the Carina Nebula.)

The Crab Nebula
(by Torres997 Radio: NRAO/AUI and M. Bietenholz; NRAO/AUI and J.M. Uson, T.J. Cornwell Infrared: NASA/JPL-Caltech/R. Gehrz (University of Minnesota) Visible: NASA, ESA, J. Hester and A. Loll (Arizona State University) Ultraviolet: NASA/Swift/E. Hoversten, PSU X-ray: NASA/CXC/SAO/F.Seward et al. Gamma: NASA/DOE/Fermi LAT/R. Buehler -Radio: http://images.nrao.edu/393; http://images.nrao.edu/34 (Very Large Array, {{NRAO}}: CC-by-3.0) Infrared:http://www.nasa.gov/multimedia/imagegallery/image_feature_567.html (Spitzer, {{PD-USGov-NASA}}: Public domain) Visible:http://hubblesite.org/newscenter/archive/releases/2005/37/image/a/ (Hubble, {{PD-Hubble}}: Public domain) Ultraviolet:http://www.nasa.gov/mission_pages/swift/bursts/swift-images.html (Swift, {{PD-USGov-NASA}}: Public domain) X-ray:http://chandra.harvard.edu/photo/2008/crab/ (Chandra, {{PD-USGov-NASA}}: Public domain) Gamma: http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10767 (Fermi, {{PD-USGov-NASA}}: Public domain))

The delicate shell

The Horsehead Nebula

HH 46/47 are small patches of nebulosity associated with newly born stars^[

Herbig-Haro

 diffuse nebula

The "Pillars of Creation" from the Eagle Nebula.

 The Flame Nebula

The Triangulum Emission Garren Nebula

The Omega Nebula

The Red Rectangle Nebula

Eagle nebula pillars

Portion of the Carina nebula

References : http://en.wikipedia.org/wiki/Nebula